======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '173'
                                          'artist'  "Ben Selvin's Knickerbockers"
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'SAY 1T WITH MUS1C'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz age', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1929'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-unsorted'
                                             'bpm'  '87.710'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '87.710'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-unsorted'
'TDRC' (Recording time)                             '1929'
'TIT2' (Title/songname/content description)         'SAY 1T WITH MUS1C'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               "Ben Selvin's Knickerbockers"
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz age', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.78 dB'
'TXXX:replaygain_track_peak'                        '0.595112'

========================== row from database ==========================
                                              'id'  1508062
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers - Say It with Music 1921.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  173
                                           'genre'  prerock-jb-jazz-unsorted
                                        'filesize'  2789376
                                           'mtime'  1620524289
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Selvin_s Say It with Music 1921 prerock jb jazz unsorted
                                      'tag_artist'  Ben Selvin's Knickerbockers
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  SAY 1T WITH MUS1C
                                             'bpm'  87.71
                                    'search_title'  '1t':2 'mus1c':4 'say':1 'with':3
                                   'search_artist'  'ben':1 'knickerbockers':5 's':3 'selvin':2 'selvins':4
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1921':12 'country':4 'exotica':2 'it':9 'jazz':1 'jb':14 'music':11 'oldies':3 'prerock':13 's':7 'say':8 'selvin':6 'unsorted':15 'with':10
                                    'search_combo'  '00oldiepop':18 '1920s':10C '1921':25 '1930s':12C '1t':2A 'and':11C 'ben':5B 'country':17 'exotica':15 'it':22 'jazz':14 'jb':27 'knickerbockers':9B 'mus1c':4A 'music':24 'oldies':16 'popular':13C 'prerock':26 's':7B,20 'say':1A,21 'selvin':6B,19 'selvins':8B 'unsorted':28 'with':3A,23
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz age', 'swing']
                                        'tag_date'  1929
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524289.2194648  (2021-05-09 03:38:09)
                             'size'  2789376